I gave it a try, but I can't tell if it helped. I'm really stumped all day today. The server keeps locking up after being up for an hour or so. I won't be able to log in even to get to the logs, then all I can do is reboot. Stopping apache and mysql does nothing. When it's like that I was able to use top at a command line, and it showed the load averages all over 100. They usually hang around 1.
I get the feeling it has something to do with either apache or mysql, but I can't find anything clear in the logs.